Constitutive analysis for the quantification of hardness decay in a superlattice CrN/NbN hard-coating

被引：7

作者：

Cabibbo, M. ^{[1
]}

Clemente, N. ^{[1
]}

El Mehtedi, M. ^{[1
]}

Hamouda, A. H. ^{[2
]}

Musharavati, F. ^{[2
]}

Santecchia, E. ^{[2
]}

Spigarelli, S. ^{[1
]}

机构：

[1] Univ Politecn Marche, DIISM, I-60131 Ancona, Italy

[2] Qatar Univ, Dept Mech & Ind Engn, Doha, Qatar

来源：

SURFACE & COATINGS TECHNOLOGY | 2015年 / 275卷

关键词：

Nanostructured coatings; Nanoindentation; Oxidation; Degradation; Constitutive equations; SUPERHARD NANOCOMPOSITE COATINGS; CHROMIUM NITRIDE FILMS; AL-N COATINGS; THERMAL-STABILITY; MECHANICAL-PROPERTIES; THIN-FILMS; DEFORMATION-BEHAVIOR; PVD COATINGS; INDUSTRIAL APPLICATIONS; OXIDATION-RESISTANCE;

D O I：

10.1016/j.surfcoat.2015.05.024

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In the present study, a constitutive analysis of the evolution of the mechanical response of a.CrN/NbN superlattice coating exposed to high temperature has been performed. Parametric approaches were used to obtain a single master curve describing the experimental data as well as time-temperature-hardness maps to extrapolate the material response. Although the parametric approaches gave an excellent description of the data, an additional effort was devoted to identifying a constitutive equation similar to the power-law function widely used in creep. An excellent description was obtained for a hardness exponent close to 18 and an apparent activation energy ranging from 400 to 500 kJ/mol. Possible micro-mechanisms giving reason for this value of the apparent activation energy were discussed. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：155 / 166

页数：12

共 77 条

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